Diffstat (limited to 'dts/Bindings/iio/proximity/devantech-srf04.txt')
1 files changed, 28 insertions, 0 deletions
diff --git a/dts/Bindings/iio/proximity/devantech-srf04.txt b/dts/Bindings/iio/proximity/devantech-srf04.txt
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+* Devantech SRF04 ultrasonic range finder
+ Bit-banging driver using two GPIOs
+ - compatible: Should be "devantech,srf04"
+ - trig-gpios: Definition of the GPIO for the triggering (output)
+ This GPIO is set for about 10 us by the driver to tell the
+ device it should initiate the measurement cycle.
+ - echo-gpios: Definition of the GPIO for the echo (input)
+ This GPIO is set by the device as soon as an ultrasonic
+ burst is sent out and reset when the first echo is
+ Thus this GPIO is set while the ultrasonic waves are doing
+ one round trip.
+ It needs to be an GPIO which is able to deliver an
+ interrupt because the time between two interrupts is
+ measured in the driver.
+ See Documentation/devicetree/bindings/gpio/gpio.txt for
+ information on how to specify a consumer gpio.
+ compatible = "devantech,srf04";
+ trig-gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>;
+ echo-gpios = <&gpio2 6 GPIO_ACTIVE_HIGH>;